Loaded TiO2 foam ceramic, and preparation method and application thereof

A technology of foam ceramics and polyurethane foam, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of high raw material requirements, reduced porosity, and high energy consumption, and achieves good photocatalytic effects and preparation methods The effect of simplicity and high photocatalytic performance

Inactive Publication Date: 2018-01-16
FUZHOU MINGGU NANOMETER SCI & TECH
View PDF8 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, photocatalysts are mostly applied in the state of powder, and a large amount of powder piled up together will not only reduce the porosity, but also affect its performance. The problem of photocatalyst loading has not been effectively solved.
This method requires secondary sintering, which consumes a lot of energy, and does not consider the problem of adhesion
The patent with publication number CN105110787 A discloses a preparation method of photocatalytic foam ceramics using potassium tetratitanate as raw material, which requires high raw material and high cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Loaded TiO2 foam ceramic, and preparation method and application thereof
  • Loaded TiO2 foam ceramic, and preparation method and application thereof
  • Loaded TiO2 foam ceramic, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] A loaded TiO 2 The preparation method of ceramic foam, concrete steps are:

[0034] (1) Preparation of nano-titanium dioxide precursor;

[0035] (2) Pretreatment of polyurethane foam: put polyurethane foam (pore size 0.3~0.8mm) in 10~20wt% NaOH solution, treat at 60°C for 1~2h, rub and clean repeatedly, and then place the foam in modifier Soak in medium for 3~12h, dry for later use, wherein the modifier is CMC or PVA;

[0036] (3) Preparation of primary slurry: Mix fused alumina powder, aluminum dihydrogen phosphate solution and distilled water to make slurry, so that the solid phase content in the slurry is 60~80wt%, and the content of aluminum dihydrogen phosphate is between 10 ~30wt%;

[0037] (4) One-time slurrying: put the pretreated polyurethane foam in the slurry, let it stretch freely and continuously squeeze, stir and knead to coat the slurry evenly on the polyurethane foam, and remove the excess slurry to obtain the slurry Biscuit;

[0038] (5) Drying of ...

Embodiment 1

[0049] A loaded TiO 2 The preparation method of ceramic foam, concrete steps are:

[0050] (1) Preparation of nano-titanium dioxide precursor:

[0051] a. Dissolve 10g of TiCl in an ice-water bath 4 Drop into 1000mL of vigorously stirred pure water at a rate of 1 drop / s to prepare 0.05mol / L TiCl 4 solution;

[0052] b. Adjust the pH value of the solution to 8 with ammonia water with a mass fraction of 5%, to obtain a precipitate of orthotitanic acid, and wash the precipitate with deionized water 10 times;

[0053] c. Disperse the precipitate in 200mL of hydrogen peroxide solution with a mass concentration of 10%, stir at room temperature for 1 hour, and add 20g of nano-SiO with a mass concentration of 30% 2 Sol, continue to stir for 30 minutes, get the precursor of nano-titanium dioxide;

[0054] (2) Pretreatment of polyurethane foam: put polyurethane foam with a pore size of 0.4mm 100×50×10mm in 15 wt% NaOH solution, treat it at 60°C for 1 h, rub and clean it repeatedly,...

Embodiment 2

[0062] The content of aluminum dihydrogen phosphate in step (3) of Example 1 was adjusted to 30 wt%, and the other conditions were the same as in Example 1, that is, the photocatalytic foam ceramic core material sample 2 was obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
bending strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a loaded titanium dioxide (TiO2) foam ceramic, and a preparation method and an application thereof. The preparation method includes the steps: (1) preparation of a nano TiO2 precursor; (2) pretreatment of polyurethane foams; (3) primary slurry coating; (4) secondary slurry coating; and (5) sintering. Through the two-time slurry coating method, nano TiO2 with an anatase form or an anatase and rutile composite crystal form is effectively firmly loaded on a foam ceramic core material, the preparation method is simple, no secondary sintering is required, the period is short, and the cost is low; a crystal form transformation control agent nano SiO2 is added in the nano TiO2 precursor, the problem of crystal form transformation of nano TiO2 at high temperature is solved, the crystal form is still the anatase form or the anatase and rutile composite crystal form after sintering at high temperature (800 DEG C to 1000 DEG C), and a relatively high photocatalytic performance is maintained; and aluminum dihydrogen phosphate is a binder, and the alumina photocatalytic foam ceramic core material is prepared at low temperature (800 DEG C to 1000 DEG C).

Description

technical field [0001] The invention belongs to the field of environmental protection technology and preparation of photocatalytic materials, in particular to a loaded TiO 2 Ceramic foam and its preparation method and application. Background technique [0002] With the development of society and the improvement of people's living standards, environmental pollution is increasingly affecting people's health, and semiconductor TiO 2 The remarkable removal effect of photocatalytic materials on various pollutants in the environment has attracted worldwide attention. At present, photocatalysts are mostly applied in the state of powder, and a large amount of powder piled up together will not only reduce the porosity, but also affect its performance. The problem of photocatalyst loading has not been effectively solved. [0003] As a new type of ceramic material with many excellent properties, ceramic foam is the third generation of porous ceramic products developed after ordinary ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B38/06C04B35/64B01D53/86B01D53/44B01D53/54B01D53/48
Inventor 余晓伟陈锡华王雅
Owner FUZHOU MINGGU NANOMETER SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap